The Atlantic Ocean borders a lot of countries, so it would be easier to know which countries your question mentioned.
But I can list some here and hopefully this will help too:
North America: Canada, USA, Mexico
South America: Argentina, Brazil, Chile, Colombia, Guyana, Suriname, Uruguay and Venezuela
Africa: Angola, Benin,Cameroon, Cape Verde, Democratic Republic of the Congo , Equatorial Guinea, Gabon, Gambia,Ghana, Guinea, Guinea-Bissau, Ivory Coast, Liberia, Mauritania , Morocco, Namibia , Nigeria, Republic of the Congo, Senegal, Sierra Leone, South Africa and Togo
Let me know which countries were on your list:)
